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Scanning electron microscope analysis of root canal surface. (A and B) Group I shows E. faecalis colonies attached to the root canal surface. (C and D) Group II (PIPS+ NaOCl) shows a clean root canal surface. (E and F) Group III (PIPS+saline) shows colonies attached to the root canal surface. (G–I) Group IV (irrigation with NaOCl) shows some colonies and the other image shows no colonies.
